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No skipping.


Argh, another Beyonce CD ruined by a tiny scratch! Good news: Even the biggest klutz can keep his or her hits skip-free with improved CDs and DVDs.

Produced by TDK TDK Türk Dil Kurumu (Turkish Language Council)
TDK The Dark Knights (gaming clan)
TDK Tokyo Denkikagaku Kogyo KK (TDK Electronics Co. Ltd.
, an electronics company, these "armor-plated" disks have a protective covering of silica silica or silicon dioxide, chemical compound, SiO2. It is insoluble in water, slightly soluble in alkalies, and soluble in dilute hydrofluoric acid. Pure silica is colorless to white.  (compound made of silicon and oxygen). Research engineers used this harder-than-glass compound because it resists abrasions, or scratches. That's important because even small nicks can block the laser beam that reads information on a disk's surface.

Toughness isn't is·n't  

Contraction of is not.


isn't is not
isn't be
 the only quality needed for no-skip CDs. A coating with large particles <onlyinclude> This is a list of particles in particle physics, including currently known and hypothetical elementary particles, as well as the composite particles that can be built up from them.  could block the laser just as a scratch does. "We needed the right ingredients to allow [the laser to read] the disk," says Bruce Bruce, Scottish royal family descended from an 11th-century Norman duke, Robert de Brus. He aided William I in his conquest of England (1066) and was given lands in England.  Youmans, TDK's vice president of marketing. Since silica can be ground into tiny particles, the laser can easily pass through the new coating. Now that's music to your ears.

JAMMIN': Music data is stored on tiny ridges on the CD's surface.

[ILLUSTRATION OMITTED]
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Article Details
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Title Annotation:Physical/Chemical Compounds
Author:Barrow, Karen
Publication:Science World
Article Type:Brief Article
Geographic Code:9JAPA
Date:Jan 24, 2005
Words:159
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